[SPARC64]: Handle zero-length map requests in pci_sun4v.c
By simply changing the do-while loop into a plain
while loop.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index d9ef0c7..a9c44c0 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -57,7 +57,7 @@
u64 *pglist = p->pglist;
unsigned long npages = p->npages;
- do {
+ while (npages != 0) {
long num;
num = pci_sun4v_iommu_map(devhandle, HV_PCI_TSBID(0, entry),
@@ -75,7 +75,7 @@
entry += num;
npages -= num;
pglist += num;
- } while (npages != 0);
+ }
p->entry = entry;
p->npages = 0;